Quote 1
THE NOTE TAKER. Simply phonetics. The science of speech. That's my profession; also my hobby. Happy is the man who can make a living by his hobby! You can spot an Irishman or a Yorkshireman by his brogue. I can place any man within six miles. I can place him within two miles in London. Sometimes within two streets. (1.118)
Here, Higgins shows that speech can be regarded as a science and used as a tool.
Quote 2
THE NOTE TAKER. A woman who utters such depressing and disgusting sounds has no right to be anywhere—no right to live. Remember that you are a human being with a soul and the divine gift of articulate speech: that your native language is the language of Shakespear and Milton and The Bible; and don't sit there crooning like a bilious pigeon. (1.125)
Here, however, he invests speech with spiritual and cultural implications; English should be respected, he argues, is important because it is the language of great artists, and a gift from God.
Quote 3
THE NOTE TAKER. You see this creature with her kerbstone English: the English that will keep her in the gutter to the end of her days. Well, sir, in three months I could pass that girl off as a duchess at an ambassador's garden party. I could even get her a place as lady's maid or shop assistant, which requires better English. That's the sort of thing I do for commercial millionaires. And on the profits of it I do genuine scientific work in phonetics, and a little as a poet on Miltonic lines. (1.129)
Again, Higgins displays a sort of ambivalence about language. He treats it as a tool for social advancement, a suitable subject for scientific inquiry, and a medium for artistic expression.